Pedal-crank



(No Model.) 2 Sheets-Sheet 1'.

(L E. LIPE. PEDAL GRANK.

No. 512,303. Patented Jan. 9, 1894.

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1112 NATIONAL LIYHOGRAPNING comnm (No Model.) I 2 he ts-Sheet 2. G. E;- LIPE, PEDAL CRANK.

No. 512,303. Patented Jan. 9; 1894.

WITNESSES: MM INVENTOR JMW MM v {M M ATTORNEYS.

UNITED STATES PATENT EEicE.

CHARLES E. LIFE, OF SYRACUSE, NEXV YORK.

PEDAL-GRAN K.

SPECIFICATION forming part of Letters Patent No. 512,303, dated January 9, 1894.

Application filed January 11, 1893. Serial No. 45 8,054. (No model.)

T0 at whom it may concern.-

Be it known that. I, CHARLES E. LIPE, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Pedal-Cranks, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

My invention relates to velocipedes and particularly to pedal cranks.

My object is to produce pedal cranks by forging or casting a blank; then boring out the body; then bending the arm on one end to produce the eye which receives the pedal shaft, and providing it with means whereby it can be adjusted upon said shaft, the pedal crank, when so manufactured comprising a body, both strengthened and reduced in weight by being bored out internally and having on one end an eye to receive the pedal shaft, and upon the other end an eye to receive the crank shaft, and provided with means to variably adjust said eye to or upon said shaft, to take up wear and to relieve the adjusting bolt from lateral or longitudinal strain.

My invention consists in the several novel features of construction and operation hereinafter described and which are specifically set forth in the claims hereunto annexed. It is constructed as follows, reference being had to the accompanying drawings, which show two forms of the pedal cranks in the blank, and in the other forms until finished, and in whicha Figure 1, is a vertical longitudinal section of the blank forging, having a single arm, after the body has been bored out. Fig. 2, is a front plan viewof said blank, the dotted lines indicating the boring out. Fig. 3, is a like view of a blank, differing a little in detail construction. Fig. 4:, is a side elevation, partly sectional of the shaft eye created by bending over the arm shown in Fig. 2, and the pedal shaft secured therein. Fig. 5, is a like view of Fig. 3, so bent over. Fig. 6, is a top plan of either Figs. 1, 4 or 5, complete. Fig. 7, is a transverse section on line 00 01:, in Fi 5.

Z, is the body of the pedal crank provided on one end with an eye -y to receive the bolt by which the pedal is thereon mounted,

its weight.

with a boss e, shown in Fig. 1 as circular and having on the other end an arm -a or one of two lateral branches bc, thearm ain Figs. 1, 2 and 3 being deflected substantially as shown,the whole blank, in either case being preferably a drop forging. The arm a is deflected out of a right-line in order that the body may be more readily bored out, as at dto strengthen and stiffen it by making it tubular and to reduce The body is provided on one side and of unequal projection and having sloping sides, in Fig. 4 as circular, its sloping sides of equal projection, and in Figs. 3 and 5 of transversely convex form with one or both sides sloping, and in all instances said boss is provided with a central threaded bolt hole -e'-.

The arm a adjacent to its extremity and upon its inner face is provided with a recess e" having a wall e'-sloping or straight, to fit upon the wall of the boss -e and extending partially or wholly around the recess; said boss and recess being struck up in the forging, the recess in Figs. 3 and 5 being concave according to the convexity of the boss. Said arm is also provided with a bolthole h, not threaded, through the center of the recess, and -h'- is a bolt or set-screw inserted through it, after said arm is bent over,- into the bolt-hole in the boss.

The end of the body is forged flat, so that when the arm is bent over, it willcreate a table m-- extending on the line of a cord across the circle of the arm created by bonding the arm, and the pedal shaft m' being flattened on one side to fit upon said table, so that said pedal cannot rotate upon said shaft.

In the construction shown in Figs. 8, 9 and 10 the body is constructed, bored out and provided with a table, the same as in the other form, and the arms -bcare provided with 2. A pedal crank comprising a body bored out for part of its length, an arm thereon, a

boss upon said body and a recess upon said I5 arm adapted to receive said boss when the arm is bent over, and means for securingsaid arm to said body.

In witness whereof l have hereunto set my hand this 28th day of December, 1892.

CHARLES E. LIPE. In resence of- C. B. KINNE, HOWARD P. DENISON. 

